Backflow Prevention Device — Annual Test: Chicago restaurant guide

Chicago Department of Water Management

What it is

Backflow (cross-connection control) devices protect the city water supply. Restaurants need them, for example on the 3-compartment sink, and they must be tested every year.

When a restaurant needs it

When devices are installed, then annually.

How to apply

Hire a licensed Cross Connection Control Device Inspector (CCCDI) to test each device and report the results to DWM.

Documents you’ll need

Device make, model, size and serial number
Test report signed by the CCCDI

Fee

Set by the tester

Processing time

Same-day test; report due within 30 days

Renewal

Annually

Who files

Only a licensed Cross Connection Control Device Inspector may test and report.

Good to know

A failed test must be reported to DWM immediately and fixed right away. Keep copies of every report.

Official source

Chicago Code 18-29-312.9 — device inspections

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Last reviewed 2026-10-06. Guidance only, not legal advice.